There's been some talk in recent years arguing that our entire universe may be a simulation by an advanced species for scientific purposes. Here are some articles with more detail:
https://www.nytimes.com/2014/02/16/opinion/sunday/is-the-universe-a-simulation.html?_r=0http://www.space.com/30124-is-our-universe-a-fake.htmlhttps://en.wikipedia.org/wiki/Simulation_hypothesisPersonally, I think it's pretty far far-fetched, but I know a couple people who entertain this possibility. Interestingly, though, I think most of these people would consider themselves atheists.
Can one still be considered an atheist if they believe our universe was consciously created and designed down to the last detail, as long as they believe it's aliens or other mortals, or does this very notion imply a level of divinity on the creator?